I know we already had a threesome thread, but the creator titled it 3sum, 3-way, 3way or I don't remember exactly what, but it was titled in a way that made the thread unsearchable. I have also gone through every single page of this section looking for it multiple times since 2011, to no avail.
Therefore, I'm making a new thread for it. Remember this story before you go to make new threads. Also remember to search for existing threads before making new threads. When in doubt, ask me and I'll be glad to help.